I adopted Wendall about a month ago. He's around 2 years old and his papers say hound/retriever mix, but I think he's actually a pointer/retriever mix.
About two weeks ago he started having diarrhea and vomited once. When the diarrhea worsened, I took him to the vet and he was put on fluids and given an antibiotic (I believe Metronidazole), a dewormer powder, and medicine for the nausea and diarrhea. As well as a prescription diet for four days. His symptoms cleared up within the next two days. The vet did not conduct a fecal testing.
From the beginning his stools were soft and a clay color, so I self diagnosed him with a sensitive stomach and needing to eat a food with less fat so I changed his food from Wellness Complete Health(what he was being given at the shelter) to Hill's Science Diet Sensitive Skin and Stomach.
After switching to the new food from his prescription diet his stools were a chocolate brown and the play-doh consistency that I've read all about over the internet.
These poops lasted for about a week, but this Tuesday (7/18) he did not poop in the morning, like usual, and that evening he pooped a clay colored "cow patty". I noticed extremely small, white specs, in the stool. I'm not 100% convinced they are from a parasite because that afternoon he had gone on a walk with my boyfriend and tried to eat something "white and crunchy."
It's now Thursday, and after speaking with the vet and doing more research she said it's possible it could be giardia or coccidia. I did not notice the specs in his stool yesterday although it seemed looser than on Tuesday. I have switched him to eating rice and boiled chicken, and a table spoon of pure pumpkin but am concerned that this might mask his symptoms if he has a more serious issue.
Could he even have a parasite if he was just given a dewormer and antibiotics? We did go to the public dog park on Sunday, which has a creek.